Related Experiment Video
Updated: Apr 15, 2026
Murine Model of Epicutaneously-Induced Immunomodulation
Published on: June 24, 2025
Immunological risks of minimization strategies
Renaud Snanoudj1,2, Claire Tinel1,2, Christophe Legendre1,2
1Université Sorbonne Paris Cité, Paris, France.
Abstract:
During the past 10 years, minimization strategies have been legitimately initiated to decrease the many toxicities of calcineurin inhibitors, especially nephrotoxicity which was considered to be responsible for the majority of graft losses. Even though CNI-induced nephrotoxicity is undeniable, we have learned in the past 10 years that DSAs detected with solid-phase assays are excellent prognostic biomarkers in kidney transplantation (and in other organ transplantations as well) and that chronic antibody-mediated rejection has become the leading cause of graft loss. In this review, we will focus on the immunological risks linked to various strategies aiming at decreasing CNI doses either at time of transplantation or later in the course of follow-up. Some of these interventions are associated with an increase in acute cellular rejection rates but also with an improvement in renal function. The effects on antibody-mediated rejection and occurrence of de novo donor-specific antibodies are still under-reported. We are currently missing long-term data to appreciate the influence of these minimization strategies on graft and patient survival. This then leads to a cautious attitude regarding reducing immunosuppression.
Insights
Calcineurin inhibitor minimization strategies in kidney transplantation aim to reduce toxicity but may increase rejection risks. Long-term data is needed to assess their impact on graft survival and guide immunosuppression decisions.
Area of Science:
- Nephrology
- Immunology
- Transplantation Medicine
Background:
- Calcineurin inhibitors (CNIs) are associated with significant nephrotoxicity, a major cause of graft loss in kidney transplantation.
- Donor-specific antibodies (DSAs) are recognized as critical biomarkers for predicting graft outcomes.
- Chronic antibody-mediated rejection is now the primary cause of kidney graft failure.
Purpose of the Study:
- To review the immunological risks associated with CNI minimization strategies in kidney transplantation.
- To evaluate the impact of reduced CNI doses on rejection rates and graft function.
- To highlight the need for long-term data on graft and patient survival following CNI minimization.
Main Methods:
- Review of current literature on CNI minimization strategies in kidney transplantation.
- Analysis of the immunological consequences of reduced immunosuppression.
- Evaluation of the role of DSAs in monitoring transplant recipients.
Main Results:
- CNI minimization strategies may increase acute cellular rejection rates but can improve renal function.
- The impact of these strategies on antibody-mediated rejection and de novo DSA development requires further investigation.
- Current data is insufficient to fully assess the long-term effects on graft and patient survival.
Conclusions:
- A cautious approach is warranted regarding the reduction of immunosuppression in kidney transplant recipients.
- Further research is essential to understand the long-term implications of CNI minimization strategies.
- Balancing CNI toxicity reduction with the risk of rejection remains a critical challenge in transplantation.
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